Liquid-fuel burner



May 1, 1923.

1,453,495 J.A.DOBPE,

LIQUID FUEL BURNER Filed Jan. 5, 1920 4 Sheets-Sheet 2 INV-ENTOR Mif JoWI 19 Des-4E Anon Nsys May 1, 1923.

Filed Jan. 5, 192 0 A fig.

J. A; DOBLE LIQUID FUEL BURNER 4 Sheets-Sheet 5- INVENTOR VVITNESE:

J01? i D0645 ATIORNBYS re heaters,

itiiey Ti,

Application 3 To a3! whom it may come-rm Be it-irnown that it, Jenn. A,-Donns, acitizen of the United States, end e resident 4 of the cit" endcounty oigen Fruncisco, State of slifomiu, here invented a certein newand useful LiquidFuei Burner, of which the following is a specification.

The invention reietes to liquid fuel burners and psrticuieriy to burners"for use in heaters.

An object of theinvention-is to provide a burner constructed to raisethe first from a suppi tank pieced at e lower level.

Anot er object of the invention is to provide an improved lubricatingsystem for the burner,

A further object of the invention is to provide a burner particularlyadapted for 7 use in hot water or hot sir heaters. The inventionpossesses other mventegeous features, some of which, with the fore oing,will be set forth at length in the folowing description, where Isheil'outline in full that form of the invention which I have $5selected for illustretion in the drawings ecvcompanying' andforming artof the resent s ecification. In said rewings have shown one embodimentotmy invention, but it is'to be understood that I do not limit 39 myselfto such form, since the invention, as expressed in the claims, may beemied in a; plurality of forms.

Referring to said drawings:

Figure 1 is a longitudinal vertical sectionzhrough one form of burnerof'my invenion.

Figure 2 is a top or plan view of the burner shown in Figure 1.

Figure 3. s a cross section through the vacuum pump, token at-right e=,to'the sectionef .3": 1 Y

Figure is e pump housi' theiine ex tomiihg a. highly combustiblemixture.

bio mixtureey be ignited Figure 5. a -ioii ontho line, 5-5,

-Figurel.

I Figure dis e'di,

tion of the burner i The burner-of. my nvention is purticw lariyadapted/for usein cotton with pieces of nent ortempore ry habitetion.'The urneur compriws e suitehie comtrio tion spark either hot ureter orhot sir heaters; insteiied in h, dweiiings for other iron end iforinedin my snitehleehepe, such i n herd which is set in the tire or hjurnerchamber or theheeter. The combustion chenoher, when formed es s howi F2,is

provided with u tsngentiei. fire iniet so thet the tissue is given atswirling motion in the chamber, causing compiete combustion of the feetin the chamber, The howi 2 is suitsioiy supported in the cast ironhousing 10 end the outer surface of the howl is spaced frorn'the Welisofthe housing to provide sir passages tl'irough which the air forcombustion passesbeiiore it is mixed with the liquid fuei. Theeir isforced into the housing, by the blower 4;, driven by the motor 5 anddisposed in the biower casing 8.-

The oir. posses from the, blower casing, through the passage 7, formedin the iower 'urt ofthe housing 10 to the for end of the ousing end thenposses into the chamber 8 formed between the bowl end the dividing wall9. This air is thus highly hosted by the hot Wells of the cmhustionchamber? and also cools these wals, maintaining their temperaturesufficientl low, so that cast iron may be employs for the combustionchamber. The hot air then passes into the annular chamber between theouter wall of the housin and the perforated hood 12 and enters the cod12 through the perforations 13, wherein it mixes with the fuel spruy endthe flame, producing complete combustion. The hood is perforated overits entiresur- .face to permit free access of the air.

Arranged within the hood, in pom'tion to be swept by incoming hot air,is a, rotctable fuel spray roducing cup 14, secured to'the shaft 15 ofthe motor 5. The cup is rotated at high speed by the motor and liquidfuelconduit 16 .is fed into'the cup through the formed in the rear wallof the housing. ,The fuel is discharged in a spray from the edge of thecup and is mixed with the hot air a: 'combusti in any suitable manner,such to by an elec- 1-: between the stetionsry eieete '1 d the ed of thecup 1%. The'electe i? is suitehiy insuieted from the hurries hone d oneside oi the i ition circuittothe eiectrode end the otter-e0 the hong,with which the cup is in electricul contect. The

fu l i IEz'ii I tit) i m the i forward end of the hood 12 into thetangential inlet 3.. Q

' The liquid do, which may be kerosene, distillate or other form. ofliquid fuel, is contained in a suitable supply tank 18, usually placedunderground or at some place below the level of the burner, and israised from the supply tank to a feed tank 19, by creating a conditionof vacuum within the feed tank. The feed tank is arranged adjacent andabovethe burner, so that the fuel fiows by ravityflfrom the feed tank tothe burner. he ,feed tank 19 is divided into two superposed compartmentsby the wall 21.

The upper compartment 22 is connected to the supply tank by a conduit 23and by producing a vacuum in the compartment 22, fuel flows from thelower supply tank into the compartment. Disposed in the uppercompartment is a float 242, provided on lts upper side with a valve 25which controls the flow of fuel into the upper compartment and on itslower side with a valve 28 which controls the flow of fuel from theupper compartment to the lower compartment 27. From the lowercompartment the fuel flows through the conduit 28 to the burner.

Means are provided for producing a. condition of vacuum within the uppercompartment. Secured to the motor casing 29 is a closed housing 31, 'onthe side wall 32 ofwhich is mounted a vacuum pump. Journaled in the sidewall 32 of the housing is a worm-wheel 33 which is engaged by the worm34 on the motor shaft. 'Pivotally mounted on the side wall below theworm wheel, is a pump cylinder 35, capable of oscillating on its pivot,which extends laterally from the cylinder intermediate the ends thereof.Disposed in the cylinder is a piston 36 which is journaled on the crankpin 37 carried by the worm wheel. lit is evident, therefore, that as theworm wheel rotates, the piston is reciprocated and the cylinder isoscillated on its pivot. The side wall of the housing is thickened toform a i7 and the outer surface of the side wall of the cyl"a der isflattened and forms tight sliding joint with the pad 4? and is heldpressed against the pad by a spring 38. Form-ed in the side wall of thecylinder which is in contact with the pad 4:? is a port 32, which on theIIPSlZIOlKGOf the piston registers with a port all in the pad, whichlatter port is connected to the upper compartment 22 of the feedtanlr bya conduit 42. Formed in the pad 47 adjacent the port 41 is a port 43which is in registry with the port 39' on the downstroke of the piston.its the piston reciprocates, the cylinder oscillates, bringing the port39 alternately into registry with the ports 41 and 4:3, producing avacuum in the compartment 22. The port 43 is connected with the conduit48 arranged within the housing and the air discharged from the massesthe chamber of the bearing 45 is a conduit- 46 which extends into thehousing 31 and upward therein, being provided on ts upper end with anenlarged mouth, the upper edge of which is in the plane of the desiredoil level in the chamber of the bearing 45. The conduit 48 is turneddown at its upper end and discharges into the conduit to. The oil in thehousing leaks through the joint between the outer cylinder wall and thepad 47 and is conveyed through the conduit 48 with the discharged air.The oil is discharged into the conduit 46, keeping it full, and therebyinsuring the proper lubrication of the bearing 45. The air dischargesthrough a vent 51 formed in the upper portion of the housing.Lubricating oil is introduced into the housing through the filling belowthe upper edge of the conduit 46, so that an excess amount of oil cannotbe introduced into the housing.

Disposed in the fuel feed pipe 28 is a regulating valve 4;? and asolenoid operated control valve 48. such as is shown in my United StatesPatent No. 1,263,653, dated April 23, 1918. The solenoid is in series inthe motor circuit, so that when the motor circuit is opened, the valveis closed and vice verse.

I claim: v

1. A liquid fuel burning system p" ing a motor, a blower driven by saidmotor for producing a stream oi? air, a liquid fuel feed tank, a conduitthrough which fuel flows by gravity from the feed tankto the air stream,a liquid fuel supply tank positioned below said feed tanlz, a conduitconnccting said tanks, a vacuum pump driven by said motor and a conduitconnecting the vacuum pump with the feed tank whereby a reduction ofpressure is produced in the feed tank which causes the fuel to flow fromthe supply tank .to the feed tanln 2. The combination with a liquid fuelburner provided with an electric motor, of a fuel feed tank, a conduitthrough which fuel flows by gravity from the feed tank to the burner,electrically operated means in. said conduit for controlling the passageof fuel therethrough, a fuel supply tank peel-- tioned below the feedtank, a conduit connecting said tanks, a vacuum pump driven by saidmotor and a conduit connecting the vacuum pump with the feed tank,whereby a condition of vacuum .is produced in the feed tank.

3; The combination with a li uid fuel burner and divided into twosuperposed lll'l I compartments, a supply tank positioned below the feedtank and connected to the Leas es.

upper compart em, a motor associatedwith said burner, a-vacuum pumpmotor and connected to 'said upper compartmen't, a float valvev in saidupper compartment controlling the flow of'fuel into said' compartmentand the a discharge of fuel. therefrom 4. The combinationwith a liquidfuel. burner,- of a- .motor .for operat ng said"- burner, a' pump pistondriven by said'mo- 'tor, an oscillating cylinder in which said;

piston isdisposed, avacuum feed tank con- .chamber in which said=bearingis disposed,

nected to the cylinder and to the burner'and a fuel supply tank arrangedbelow the feed:

tank. i

5.'In a liquid fuel burner, a motor, a housing associated with saidmotor, 'acylinder pivotally mounted in said-housing,-a--

piston in said cylinder operativelyconnected to said motor, a port 1nsaid cylinder, and a port in said housing adaptedto register'withthe"cylinder' port onythe suction stroke of the-piston. e 1 6.'In aliquid. fuel burner, a metallic combustion chamber, a housingsurrounding and spaced from said combustion chamber whereby a passage isformed. within the housing, a fuel passage and into driven by said.

opening into mixing' chamber discharging I intothe combustion chamber,means 'forblowing air. through said ing chamber for producing afuelspray-and means for ignitingthe combustible mixture, '7. In a liquidfuel burner, a motor, a shaftfor said motor, a. housing partiallyfilledwith oil, aconduit the housing above the-level of. the. oiland'connected with vacuum pump in said housing partially submerged m theoil therein a dlschar'ge conduit for said; pump discharging into saidfirst=named 'condu'ltwherebyoil passing bearing for said shaft, a I

said bearing, a

through said discharge conduit is delivered to saidfirst conduit.

8. In a liquid'fuel burner, for said motor, abearing for said amotor, ashaft shaft, a

a housing partially filled with oil, a conduit oil'in-sald housing, saidopenin being on alevelwiththe desired oil level in thebearjng-chamben-a'vacuutn pump insaid hous-. i-ng partially submerged inthe oil therein 7 .and adapted to pump air andoil, a dis-''charge'conduit for said pump opening into said first-named' conduit,and means con 'xiecting the pump and the motor.

In testimony whereof, I have hereunto set an Francisco, 3 th daytat-December, 1919.

' 'Jonu A. gnome.

myhand .at

In presence of-- California, this,

